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  5. PRTA
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PRTA

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    Overview
    Forecast
    Valuation
    Earnings
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Market Estimates

Earnings Estimates
Earnings Estimates
Revenue
YoY Chg
EPS
YoYChg
FY2025Q4
FY2026Q1
FY2026Q2
666.67K
-68.6%
-0.559
-48.28%
0.00
-100%
-0.330
-70.54%
76.68M
+1634.73%
1.037
-144.3%
Estimates Revision
The market is revising Downward the revenue expectations for Prothena Corporation plc (PRTA) for FY2025, with the revenue forecasts being adjusted by -50.17% over the past three months. During the same period, the stock price has changed by 30.53%.
Revenue Estimates for FY2025
Revise Downward
down Image
-50.17%
In Past 3 Month
EPS Estimates for FY2025
Revise Upward
up Image
+0.21%
In Past 3 Month
Stock Price
Go Up
up Image
+30.53%
In Past 3 Month
Wall Street analysts forecast PRTA stock price to rise over the next 12 months. According to Wall Street analysts, the average 1-year price target for PRTA is 21.20 USD with a low forecast of 11.00 USD and a high forecast of 36.00 USD. However, analyst price targets are subjective and often lag stock prices, so investors should focus on the objective reasons behind analyst rating changes, which better reflect the company's fundamentals.
5 Analyst Rating
Wall Street analysts forecast PRTA stock price to rise over the next 12 months. According to Wall Street analysts, the average 1-year price target for PRTA is 21.20 USD with a low forecast of 11.00 USD and a high forecast of 36.00 USD. However, analyst price targets are subjective and often lag stock prices, so investors should focus on the objective reasons behind analyst rating changes, which better reflect the company's fundamentals.
4 Buy
1 Hold
0 Sell
Strong Buy
Current: 11.160
sliders
Low
11.00
Averages
21.20
High
36.00
Current: 11.160
sliders
Low
11.00
Averages
21.20
High
36.00
BofA
Tazeen Ahmad
Underperform
maintain
$4 -> $8
2025-11-24
Reason
BofA
Tazeen Ahmad
Price Target
$4 -> $8
2025-11-24
maintain
Underperform
Reason
BofA analyst Tazeen Ahmad raised the firm's price target on Prothena (PRTA) to $8 from $4 and keeps an Underperform rating on the shares. Prothena no longer plans to disclose further data for its Alzheimer's drug PRX012, notes the firm, which removed value for the program from its model and is shifting focus on valuation to two Phase 3 assets under development by partners Novo (NVO) and Roche (RHHBY) - Coramitug for ATTR-cardiomyopathy and prasinezumab for early-stage Parkinson's disease. While both programs will have begun Phase 3 studies by year-end, which the firm views favorably for Prothena, the firm adds that each drug will need several years to reach the market and their competitive positioning in the case of Coramitug and clinical efficacy in the case of prasinezumab are "uncertain."
H.C. Wainwright
Buy
maintain
$20 -> $30
2025-11-07
Reason
H.C. Wainwright
Price Target
$20 -> $30
2025-11-07
maintain
Buy
Reason
H.C. Wainwright raised the firm's price target on Prothena to $30 from $20 and keeps a Buy rating on the shares. The firm believes the market is overlooking the company's two partnered Phase 3 programs and a partnered Phase 2 asset with blockbuster potential.
Piper Sandler
NULL
to
Overweight
upgrade
$15 -> $36
2025-10-28
Reason
Piper Sandler
Price Target
$15 -> $36
2025-10-28
upgrade
NULL
to
Overweight
Reason
Piper Sandler raised the firm's price target on Prothena to $36 from $15 and keeps an Overweight rating on the shares. The firm recognizes the value of its partnered pipeline with lucrative potential across net sales royalties and milestone payments. Piper remains bullish on Prothena and believes that there is substantial upside opportunity heading into a catalyst-rich next 12 months-plus.
Citizens JMP
Jason Butler
Outperform
downgrade
$29 -> $11
2025-09-02
Reason
Citizens JMP
Jason Butler
Price Target
$29 -> $11
2025-09-02
downgrade
Outperform
Reason
Citizens JMP analyst Jason Butler lowered the firm's price target on Prothena to $11 from $29 and keeps an Outperform rating on the shares. Prothena last week reported results from cohort A of the Phase 1 PRX012 in Alzheimer's disease patients, with results demonstrating a favorable reduction in amyloid levels at the 200mg and 400mg doses, but this benefit was accompanied by elevated, uncompetitive ARIA incidence in PRX012-treated patients, the analyst tells investors in a research note. The ARIA AE profile likely makes PRX012 competitively unviable in early-stage AD patients, the firm says.
Piper Sandler
Overweight
downgrade
$81 -> $15
2025-08-28
Reason
Piper Sandler
Price Target
$81 -> $15
2025-08-28
downgrade
Overweight
Reason
Piper Sandler lowered the firm's price target on Prothena to $15 from $81 and keeps an Overweight rating on the shares. While the firm was disappointed to see PRX012's ASCENT program hit non-competitive rates of ARIA, Piper is not concerned about Prothena as the company has a high-value partnership pipeline ripe for future cash opportunities. Firstly, the firm thinks it is crucial not to minimize the ASCENT data as it effectively supports PRX012's mechanism and de-risks second generation, PRX012-TfR, with plans underway to seek potential partnership opportunities for both. Furthermore, Piper thinks there is a lot of value attached to Prothena's robust partnership pipeline. That said, the firm removed PRX012 in AD from its model as it is viewing potential partnership as an upside.
BofA
Tazeen Ahmad
Neutral -> Underperform
downgrade
$22 -> $4
2025-05-28
Reason
BofA
Tazeen Ahmad
Price Target
$22 -> $4
2025-05-28
downgrade
Neutral -> Underperform
Reason
BofA analyst Tazeen Ahmad downgraded Prothena to Underperform from Neutral with a price target of $4, down from $22.
See All Ratings

Valuation Metrics

The current forward P/E ratio for Prothena Corporation PLC (PRTA.O) is 103.24, compared to its 5-year average forward P/E of -0.82. For a more detailed relative valuation and DCF analysis to assess Prothena Corporation PLC 's fair value, click here.
  • Forward PE
  • Forward EV/EBITDA
  • Forward PS

Forward PE

The forward P/E ratio is a valuation metric that divides a company's current stock price by its estimated future earnings per share over the next 12 months.
StronglyUndervaluedUndervaluedFairOvervaluedStronglyOvervalueddotted line Image
N/A
5Y Average PE
-0.82
Current PE
103.24
Overvalued PE
29.68
Undervalued PE
-31.33

Forward EV/EBITDA

The forward EV/EBITDA ratio is a valuation metric that divides a company's enterprise value (EV) by its estimated future earnings before interest, taxes, depreciation, and amortization (EBITDA) over the next 12 months.
StronglyUndervaluedUndervaluedFairOvervaluedStronglyOvervalueddotted line Image
N/A
5Y Average EV/EBITDA
-5.69
Current EV/EBITDA
0.00
Overvalued EV/EBITDA
17.32
Undervalued EV/EBITDA
-28.69

Forward PS

The forward P/S ratio is a valuation metric that divides a company's current stock price by its estimated future sales (or revenue) per share over the next 12 months.
StronglyUndervaluedUndervaluedFairOvervaluedStronglyOvervalueddotted line Image
N/A
5Y Average PS
82.00
Current PS
0.00
Overvalued PS
248.67
Undervalued PS
-84.67
Financial AI Agent
Financial AI Agent

Financials

Annual
Quarterly
N/A
Total Revenue
N/A
Operating Profit
N/A
Net Income after Tax
N/A
EPS - Diluted
N/A
Free Cash Flow
N/A
Gross Profit Margin - %
N/A
FCF Margin - %
N/A
Net Margin - %
N/A
ROIC

Trading Trends

  • Insider
  • Hedge Fund
  • Congress Trading
Insider
Insiders are Neutral. There are no significant trading trends over the last month.
Sold
Bought
Hedge Fund
Hedge Funds are Neutral. There are no significant trading trends over the last quarter.
Sold
Bought
Congress Trading
Congress are Neutral. There are no significant trading trends over the last month.
Sold
Bought
Insider
Insiders are Neutral. There are no significant trading trends over the last month.
Sold
Bought
AI Stock Picker
AI Stock Picker

PRTA News & Events

Events Timeline

(ET)
2025-12-01
06:22:00
Citizens JMP Raises Prothena Price Target to $19, Potential Milestone Payments Up to $105M
select
2025-11-19 (ET)
2025-11-19
16:07:09
Prothena Reveals Poster Presentation for TDP-43 CYTOPE Initiative
select
2025-11-11 (ET)
2025-11-11
09:14:28
Prothena Showcases Encouraging Phase 2 Coramitug Results Featured in AHA Journal
select
Sign Up For More Events
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News

[object Object]
Preview
6.0
12-01Benzinga
Amazon Set to Surge by 31%? Check Out 10 Leading Analyst Predictions for Monday
  • Analyst Upgrades and Downgrades: JP Morgan downgraded Argan Inc while raising its price target, Oppenheimer maintained an Outperform rating for Amazon with a price target increase, and RBC Capital downgraded PTC Therapeutics despite raising its price target.

  • Price Target Adjustments: Barclays lowered Crown Castle's price target and downgraded its rating, while Benchmark raised Light & Wonder's target and maintained a Buy rating.

  • Significant Increases: Mizuho raised Insmed's price target significantly and maintained an Outperform rating, while HSBC upgraded Thermo Fisher Scientific from Hold to Buy with a notable price target increase.

  • Mixed Ratings: Argus Research cut Target's price target but kept a Buy rating, and BMO Capital reduced Old Dominion's target while upgrading its rating to Outperform.

[object Object]
Preview
9.0
11-12Benzinga
Novo Nordisk's Coramitug, a $100 Million Investment, Shows Potential in Lowering Heart Failure Biomarkers
  • Phase 2 Trial Results: Novo Nordisk's coramitug, an antibody for transthyretin amyloidosis with cardiomyopathy (ATTR-CM), showed a significant reduction in NT-proBNP levels at a 60 mg/kg dose, indicating potential effectiveness, though it did not significantly impact the six-minute walk test.

  • Background on Coramitug: Originally developed by Prothena Corporation and acquired by Novo Nordisk in 2021, coramitug targets misfolded transthyretin to promote amyloid clearance and is currently being evaluated in a Phase 3 trial named CLEOPATTRA.

  • Participant Demographics: The trial involved 104 participants, with 90% on disease-modifying therapy, primarily using Pfizer's Vyndaqel/Vyndamax, and demonstrated that coramitug was well tolerated with improved echocardiographic parameters.

  • Market Impact: Following the trial results, Novo Nordisk's stock saw a slight increase of 0.87% in premarket trading, reflecting investor interest in the potential of coramitug in treating ATTR-CM.

[object Object]
Preview
9.0
11-11Newsfilter
Prothena Showcases Phase 2 Results for Coramitug (Previously PRX004) Featured in Circulation, AHA's Official Journal
  • Phase 2 Data Publication: Novo Nordisk's coramitug, an investigational antibody for treating ATTR amyloidosis with cardiomyopathy, has shown promising Phase 2 clinical trial results, which were published in the journal Circulation and presented at the AHA Scientific Sessions.

  • Ongoing Phase 3 Trial: Following the Phase 2 results, Novo Nordisk has initiated the Phase 3 CLEOPATTRA clinical trial to further evaluate coramitug's effects on cardiovascular outcomes in patients with ATTR-CM.

  • Acquisition Details: Novo Nordisk acquired Prothena's ATTR amyloidosis business for up to $1.2 billion, with Prothena eligible for milestone payments as the clinical trials progress, including $100 million already earned.

  • Coramitug's Mechanism of Action: Coramitug is designed to deplete amyloid deposits associated with ATTR amyloidosis while preserving the normal form of the protein, potentially serving as a monotherapy or complementing existing treatments.

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FAQ

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What is Prothena Corporation PLC (PRTA) stock price today?

The current price of PRTA is 11.16 USD — it has decreased -0.09 % in the last trading day.

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What is Prothena Corporation PLC (PRTA)'s business?

Prothena Corporation plc is an Ireland-based late-stage clinical biotechnology company. The Company is engaged in protein dysregulation and a pipeline of investigational therapeutics for rare peripheral amyloid diseases. The Company is advancing a pipeline of therapeutic candidates for a range of indications and targets to integrate scientific insights around neurological dysfunction and the biology of misfolded proteins. The Company’s pipeline includes both wholly owned and partnered programs being developed for the potential treatment of diseases, including AL amyloidosis, ATTR amyloidosis, Alzheimer’s disease, Parkinson’s disease and a range of other neurodegenerative diseases. Its clinical programs include birtamimab for the potential treatment of AL amyloidosis, prasinezumab for the potential treatment of Parkinson’s disease, NNC6019/PRX004 for the potential treatment of ATTR amyloidosis, and PRX005 and PRX012 for the potential treatment of Alzheimer’s disease.

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What is the price predicton of PRTA Stock?

Wall Street analysts forecast PRTA stock price to rise over the next 12 months. According to Wall Street analysts, the average 1-year price target for PRTA is 21.20 USD with a low forecast of 11.00 USD and a high forecast of 36.00 USD. However, analyst price targets are subjective and often lag stock prices, so investors should focus on the objective reasons behind analyst rating changes, which better reflect the company's fundamentals.

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What is Prothena Corporation PLC (PRTA)'s revenue for the last quarter?

Prothena Corporation PLC revenue for the last quarter amounts to 2.42M USD, increased 148.97 % YoY.

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What is Prothena Corporation PLC (PRTA)'s earnings per share (EPS) for the last quarter?

Prothena Corporation PLC. EPS for the last quarter amounts to -0.68 USD, decreased -38.18 % YoY.

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What changes have occurred in the market's expectations for Prothena Corporation PLC (PRTA)'s fundamentals?

The market is revising Downward the revenue expectations for Prothena Corporation plc (PRTA) for FY2025, with the revenue forecasts being adjusted by -50.17% over the past three months. During the same period, the stock price has changed by 30.53%.
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How many employees does Prothena Corporation PLC (PRTA). have?

Prothena Corporation PLC (PRTA) has 163 emplpoyees as of December 05 2025.

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What is Prothena Corporation PLC (PRTA) market cap?

Today PRTA has the market capitalization of 600.74M USD.

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